water spray small droplets

PauliusRap · December 30, 2014, 05:09

Dear forum members,

I have a simulation with air and water interaction. during this simulation a water spray forms (tiny splashes of water and air) that seem to cause simulation to stop (iteration did not converge). I am using a quite a dense mesh and further reducing the size of cells could become a bit to difficult to my machine. Maybe someone could suggest a way around the problem with splashing water?

Best regards,
Paulius

JBurnham · January 3, 2015, 20:08

First try making your initial conditions match your boundary conditions so that fluid isn't splashing at the beginning. If you already tried that, then try Model Setup > Numerics tab > VOF Methods > Advanced Options > Fluid Fraction Cleanup (FCLEAN) = 0.15. That will delete any fluid regions where all connected cells with fluid have < 15% fluid in them. In other words, it will delete droplets.

December 30, 2014, 05:09	water spray small droplets	#1
PauliusRap New Member Paulius Join Date: Aug 2014 Posts: 2 Rep Power: 0	Dear forum members, I have a simulation with air and water interaction. during this simulation a water spray forms (tiny splashes of water and air) that seem to cause simulation to stop (iteration did not converge). I am using a quite a dense mesh and further reducing the size of cells could become a bit to difficult to my machine. Maybe someone could suggest a way around the problem with splashing water? Best regards, Paulius

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January 3, 2015, 20:08		#2
JBurnham Senior Member Jeff Burnham Join Date: Apr 2010 Posts: 204 Rep Power: 17	First try making your initial conditions match your boundary conditions so that fluid isn't splashing at the beginning. If you already tried that, then try Model Setup > Numerics tab > VOF Methods > Advanced Options > Fluid Fraction Cleanup (FCLEAN) = 0.15. That will delete any fluid regions where all connected cells with fluid have < 15% fluid in them. In other words, it will delete droplets.